Economizer for steam-boilers



J. E. BELL.

ECONOMIZER FOR STEAM BOILERS. APPLECATION FILED ocT; 20, 1920.

Patented Oct. 4, 1921.

2 SHEETS-SHEET I.

EHTOR TL Z ,M BY fi 1.

ATTORNEYS J E. BELL.

ECONGMIZER FOR STEAM BOlLERS.

APPLICATION FILED OCT. 20, 1920.

' 2 SHEETS-SHEET 2- IIIIIHII 45 of plates or blocks a cross near rarasearner carton.

JOHN E. BELL, OF BROOKLYN, NEW YORK, ASSIGNOR '10 POWER SPECIALTYCOMPANY, OF NEW YORK, N. 1.

nconomznn non srnam-rornnns.

resents.

Specification of Letters Patent.

Patented Oct. 4, 1921.,

application filed October 20, 1920. Serial No. 418,200.

To all whom it may concern;

Be it known that I, Jon-N E. BELL, a citizen of the United States ofAmerica, residing at Brooklyn, in the county of Kings and I 5 State ofNew York, have invented certain new and useful Improvements inEconomizers for Steam-Boilers, of which the following is a full, clear,and exact description. In-hertain forms of economizers for steam boilersit has heretofore been the practice to employ transverse tubes united ator near their" ends to rectangular iron plates or blocks which are laidone upon the other in horizontal rows to form the walls of the heatingchamber and to connect the tubes by suitable headers outside the wall orwalls thus formed.

The weight of the'tubes and lar end plates or blocks is veryconsiderable and when the dimensions ofthe structure are at allsubstantial the pressure between the miperposed plates or blocks is sogreat that it becomes ditticult to remove any one block and itsponnectedqtube, particularly one near the lower part of the wall.

able from a practical standpoint as it frequently becomes necessarytoremove a block and tube for purposes of examination or repair. avoidedby supporting each horizontal row of end blocks on metal beams, but thisis not feasible because" of the massive character and expense of thebeams which would be re quired to support the weight across the entirewall and preventsagging.

I have sought to overcome this objection and to construct an economizeror this kind in a more simple and economical way in whichQa-ny one ormore oi the end plates or blocks and their connected tubes may bereadilyand easily removed in the necessity arises for so doing.According to myv present invention I employ in connection with eachhorizontal row smalll size upon which ,the plates rest and which in turnare supported by contact with but with each plate the row of platesbelow,

I employ a peculiar wedge intermediate its corners and the beam beneathwhich normally forced into its position and takes up the weight of thesaid plates, but which may -be withdrawn whenever required to permit 1'the plate to fall upon the beam and thus become loose so that it may beeasily removed.

supported by the wedges the the rectangu- This is obj ection- Theobjection may in a measure bebeam'of rehitivelyplate and the wall is orwall is thus wall as a whole is as solid and has as little tendency tosag as thou h the plates all rested edge to edge upon themselves and theremoval of the wedges of one plate leaves such .a short length of thecross beams to sustain the weight above it that there is no tendency tosag.

This improvement I have illustrated in the accompanying drawings inwhich- As each plate in the bank Figure 1 IS a view in elevation of thewall composed of the end plates or blocks showing thewedges-incorporated therewith. The outer walls of the structure areshown in section in this figure.

Fig. 2 is a vertical sectional view of the wall and wedges.

Fig. 3 is an enlarged detail of one of the wedges.

Fig. 4 is a similar right angles to Fig. 3.

Fig. 5 is a detail view of a modified form of wedge and Fig. 6 is an-endview of the same. The structure generally is of the usual character andconstruction and comprises a bank of-tubes 1-, preferably of wroughtsteel incased in corrugated rings of cast iron 2. To each tube near itsend is joined a rectangular block or plate 3 of cast iron and theprojecting ends of the tubes are properlyconnected by headers 4.

The walls of thetube or heating chamber are built up by the horizontalrows of end plates 3, as shown in Figs. 1 and 2 and the outer wallinclosing the space which con tains the headers is of the usualcharacter and designated by 5.

Between the horizontal rows of end plates 3, are cross beams 6 which arepro erly sup ported in the walls or setting at tieir ends. These beamsneed not be of any greater dimension than is suilicient to supportractically a single end plate upon each lineal unsupported stretch thatis occupied by such so built up that each beam rests for its entirelength upon the top edg ofthe horizontal row of plates beneathit Therojw' of end plate .above the beam are supported upon such beam, notdirectly, but by means of wedges the construction of which is shown inFigs. 2, 3 and 4. The end plates have cut away parts at their lowercorners and in these cut away portions saddles 7 are placed which spanthe beam 6. Over these saddles are wedg 8 with threaded extensions orbolts and when the end plates are positioned, keys 9 of proper shape areinserted between the wedges and the shoulders of the cut away portlonsof the plates and are forced home bynuts 10 and washers 11, and therebycaused to raise the end plates so that they are forced up against thecross beam above and rest upon that below.

The upper portion of Fig. 2 shows the parts before being secured intheir final position in which they are shown in the lower portion of thefigure.

If any plate is to be removed the wedges under its lower corners arewithdrawn so that it sinks away from the beam above and onto the beambelow. Being thus loosened it may easily be withdrawn. The end plateabove it does not sink as the beam 6 upon which it rests is amplysufficient to support it as the span upon which the weight is imposed isonly slightly greater than the width of one plate.

The wedge shown in Fig. 3 is the preferred form, but others may be used.For example, the bolt 12 of Figs. 5 and 6 may be T-shaped and the wedge13 may be engaged by and drawn up by the bolt when the nut 10 is turned.

verse tubes secured to end plates which sup-- port the tubes and whichare built up in the manner described to form a wall. The

invention is particularly designed for and applicable to an economizersuch as I. have shown in a prior application Serial No.

336,284, filed November 7, 1919, but may be 2. The combination with thebank of tubes.

and substantially rectangular end plates secured thereto arranged insuperposed horizontal rows to form a wall, each end plate having itslower corners notched or cut away, of cross beams between the horizontalrows and removable wedges between said beams and the shoulders of thenotches or cut away portions of the plate above.

3. The combination with the bank of tubes and substantially rectangularend plates secured thereto, arranged in superposed horizontal rows toform a wall, each end plate having its lower corners notched or cutaway, of cross beams between the horizontal rows, saddles on said beamsextending through the said notches or cut away portions and wedges onsaid saddles and means for tightening said wedges so as to support theplate above upon said beam.

In testimony whereof I hereto aflix my signature.

JOHN E. BELL.

